With one minor detail, Illinois' surrounding states aren't giving the finger to federal law. Also if Chicago's problems were rooted in guns, the entire country would be a shooting gallery. Nice try, bad comparison.

Problem solved."
I'm not following you down the gun control rabbit hole. Enforcing current laws has to be done to even see if new laws are needed.
Harboring fugitives is the 1st thing that comes to mind as a matter of state-wide policy. Thankfully some of the cities are revolting against this.

the "sanctuary state" bill protects immigrants without legal residency by limiting state and municipal cooperation with the feds, including what information can be shared about illegal-immigrant inmates

Oakland Mayor Libby Schaaf's decision to warn of an immigration sweep in advance, which ICE said allowed hundreds of immigrants to escape detention.
The Justice Department in January threatened California and other states with subpoenas and a loss of grant money for repeatedly failing to respond to requests for immigration compliance under a federal law known as Section 1373.

A coordinated ICE enforcement action last month on businesses in the Los Angeles area netted 212 people arrested for violating federal immigration laws, 88 percent of whom were convicted criminals.